News Earth

Quick Bite: Some gorges carved surprisingly fast

By Sid Perkins

- More than 2 years ago

Two river gorges along the Atlantic seaboard were carved out over a geologically short period, according to analyses of rock samples from the chasms.

HIGH WATER. Most of the erosion along the Potomac River’s Mather Gorge results from large floods, such as this one in June 2003 just upstream of Washington, D.C.